Window lock



Feb. 18, 1930. c. GROSSE 1,

Witnesss= Carl Grosse. 74% W M. BJ/WWW HzaAiiorney WINDOW LOCK Filed May11, 1928 In ven tar Patented Feb. 18, 1930 UNITED STATES PATENT OFFICE?CARL GROSSE, or CHICAGO, ILLINOIS, ASSIGNOR or ONE-HALF. To JAMES A.zoUEEx,

or crcnao, ILLINOIS 1 WINDOW LOCK 1 Application filed May 11, 1928.'SerialNo. 276,891.

My invention relates to window locks, and more particularly to windowsash locks, having for its object the provision of a device of the kinddescribed of comparatively simple and inexpensive construction,convenient of operation, and particularly adapted for quantityproduction.

Other objects and advantages of the construction and arrangement ofparts will appear more fully in the hereinafter specification when takenin connection with the accompanying drawings, in which,

Figure 1 is a perspective view of a window frame, showing my deviceapplied to the sashes thereof.

Figure 2 is a face view of my device as shown on the inner side of thewindow.

Figure 3 is a longitudinal sectional view of my device.

Figure 4 is a bottom plan view thereof.

In the drawings wherein similar characters of reference indicatecorresponing parts in the several views, A designates a window framehaving upper and lower sashes, 8 and 5 9 respectively. On the upper sash8 I secure by screws 9 the keeper member 10. The keeper is die-stampedfrom a sheet of metal in a manner to form a slot 11. About the slot, acountersunk portion 12 is circumscribed which is adapted to serve as asliding seat for a stud bolt 22 integral with a finger lug member to behereinafter described.

On one side of the slot, a series of notches 13 are provided into whichthe stud bolt is adapted to enter for the purpose of securing the windowsashes in open position to the extent indicated by the distance apart ofthe several notches.

The cooperating member of my window lock comprises a bracket 14: havinga flange 15 adapted to be secured by screws to the upper rail of thelower window sash 9. As best shown in Figure 3 in the wall of thebracket 14 a hole 14 is provided to receive a stud bolt 16 having ashouldered portion 17 and an upper head 18. The other end of the studbolt is provided with a smaller head 19 which seats in the countersunkpart of the hole. Yieldingly clamped to the wall of the bracket 14 by aspring 20 which coacts with the head sired for any reason to open thewindows be yond the scope provided by the slot 11, it will merely benecessary when both sashes are ,7 closed, to operate the finger lug 21against the spring 20, whereupon the bolt head 22 will pass out of thecircular opening 23 which will permit the finger lug 2l to be placedatright angles to the bracket 15, in, 7

inoperative position, as best shown in Fig- 111641. To make the deviceagain operative,

the bolt head 22 is repassed through the hole 23 whereupon the lock willresume its nor mal functions. The window sashes are now free to beraised and lowered, to their fullest extent without interference.

The purpose of the window lock is to provide a method of preventingunauthorized entrance into a house or building while permitting areasonable amount of ventilation.

. It is, of course, obvious that the slot 11 may be made as long as theside rail of the window sash itself which would permit,if desired, thewindows to be raised to their fullest ex- 5 tent and then secured asindicated. It is generally preferable, however, to restrict the lockingdevice to the limits illustrated for the reason that if the sashes areopen wide enough, entrance may be effected throughthe to window frame.

It will be evident that minor changes of construction and arrangement ofparts may be resorted to if desired, without departing from the spiritor sacrificing any of the ad- ,95 vantages of my invention as definedwithin the scope of the appended claims.

What I claim and wish to secure by Letters Patent is:

1. A window sash lock comprising a keeper 10o having a slotcircumscribed by a countersunk portion on the keeper, a plurality ofnotches formed in said keeper and communicating with said slot, a fingeroperated lug having a shank riding in said slot, said shank belngsurmounted by an integral head riding in said countersunk portion andanchoring in said notches, and means connected to and coacting withsaidfinger lug to maintain it in position and release said integral headfrom said slot. 7

2. A window sash lock comprising a keeper having a slot, a plurality ofnotches communicating with the slot, a finger lug actutated by a spring,said lug having an integral head slidable in the slot, a bracket havingan aperture registering with a hole in the finger lug; a shafton theintegral head passing through said holes, and a spring coacting withsaid integral head and said bracket to yieldingly maintain inposition inthe slot and release therefrom when desired, said integral head.

3. A window sash lock, comprising a keeper having 'a slot circumscribedby a countersunk portion on the keeper, a plu- 'rality of notchescommunicatlng with said slot and countersunk portion, a circular openingat the bottom of the slot to admit a head on a finger lug, said lugbeing resiliently and pivotally connected to a rigidly secured bracketwhereby means are provided to option'ally engage and disengage saidkeeper and said bracket. 7

4. In a window locking device a keeper having a longitudinal slot withcommunicating notches therein, a circumscribed shoulder about said slot,a bolt having a head received by said slot and slidably confined by saidshoulderedportion, said head being integral with a finger lug yieldinglyand pivotal- 1y mounted on a bracket secured to a lower window sash, andmeans to disengage said lug from said keeper when desired, said fingerlug being adapted to be placed at right angles to said bracket when ininoperative position. In testimony whereof I have signed my name to thisspecification.

' CARL GROSSE.

